I've survived being hit by the boulders, just barely. I mean, it was regular NG, but still.

Cainhurst armour is not very good against blunt, its better off against physical, which is slashes, claws and bites. Ive been one shotted too, a direct boulder hit is very painful.

They hit with a boulder 2-5 times it split in 4 and if you are lucky then you get 5 hits

Im not sure, but i think if they hit you directly with a boulder it will always kill you. i've certainly never seen anyone survive it...

Possibly, but they also posses many differences. Like the fur, and the many wounds on the giants. Besides the height difference, the body structure is also quite different. We also have Silver beasts and winter lanterns, nightmare denizens that have different skin from both giants and messengers. The various beasts of the nightmare may vary in appearance.

Who knows maybe the nightmare had some evolution fearing people and so evolution like gient a changing toe numbers

I'm willing to dispute them dropping Blood Stone Chunks, big time. I used my item farming gear, killing enough of them to score myself 1.5M echoes in NG+. During that time, not a single chuck dropped. They usually drop one Twin Blood Stone shard and more rarely 3 of them at once, plus a super rare lead elixir that I saw twice during that time. This is for the Nightmare of Mensis version. No idea about the ones in Nightmare Frontier.

They do indeed drop blood stone chunks. I have seen it with Mein own eyes

We seem to be missing the picture, if you can get one please add it!

*they just seem

lol, and what about every other beast in the game that's just an innocent twonsperson?

Now I ain't saying I'm right, but I thought it had something to do with the Orphanage, and that these were the child experiments that didn't turn out so bright, so the Choir used them as manual slaves. Hence the lacerations and bound feet.

This is also a good way to farm blood/twin stone shard, as every time the brain kills it you get one of these drops.

All the enemies, as far as I know, take damage from the brain. I don't think they get frenzy'd, but like you take damage in addition to frenzy.

It seems like the light from the brain deals some amount of blood damage seeing as these guys are weak to blood damage and they would be killed much more quickly. I don't think enemies can actually be frenzied fast enough for it to matter.

I've noticed finishing enemies with certain attacks can send them through the floor in general. I've had a variety of enemies clip into the ground when hit with a charged attack from the transformed burial blade, as well as certain attacks from the transformed saw spear.